A patient presents with nausea, vomiting, and diarrhea, hypotension, elevated creatinine, and lactic acidosis; GI panel is negative, and the discharge diagnoses include gastroenteritis and AKI. What additional condition could be considered?

A patient presents with nausea, vomiting, and diarrhea, hypotension, elevated creatinine, and lactic acidosis; GI panel is negative, and the discharge diagnoses include gastroenteritis and AKI. What additional condition could be considered?

• A. Hyponatremia
• B. Hypovolemic shock
• C. Hyperkalemia
• D. Sepsis

Answer: (B)

Volume depletion from vomiting and diarrhea reduces circulating blood volume, lowering venous return and cardiac output. When perfusion to tissues and organs falls, the kidneys receive less blood, causing AKI from decreased renal perfusion, and the body shifts to anaerobic metabolism, producing lactic acidosis. In this setting of hypotension with elevated creatinine and lactic acidosis after GI fluid losses, hypovolemic shock is the most fitting additional condition to consider. A negative GI panel helps focus away from an infectious gastroenteritis as the sole driver, and while electrolyte disturbances like hyponatremia can accompany GI losses, they don’t by themselves explain the shock state; sepsis could be on the differential, but the picture most strongly aligns with volume depletion causing hypoperfusion.

Volume depletion from vomiting and diarrhea reduces circulating blood volume, lowering venous return and cardiac output. When perfusion to tissues and organs falls, the kidneys receive less blood, causing AKI from decreased renal perfusion, and the body shifts to anaerobic metabolism, producing lactic acidosis. In this setting of hypotension with elevated creatinine and lactic acidosis after GI fluid losses, hypovolemic shock is the most fitting additional condition to consider. A negative GI panel helps focus away from an infectious gastroenteritis as the sole driver, and while electrolyte disturbances like hyponatremia can accompany GI losses, they don’t by themselves explain the shock state; sepsis could be on the differential, but the picture most strongly aligns with volume depletion causing hypoperfusion.